#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)

using std::cin;
using std::cout;

int main() {
	int n;
	double p;
	cin >> n >> p;
	
	if (n >= 200) {
		puts("1");
		return 0;
	}
	
	double ans = 1 - pow(1-p, n);
	printf("%.10lf\n", ans);
	
	return 0;
}